Robert Llewellyn is an English actor, presenter, and writer. He is probably best known for his roles as presenter of Scrapheap Challenge, and as the android Kryten in the hit sitcom Red Dwarf.

His skills as a physical performer encouraged Grant and Naylor to write Robert Llewellyn additional characters for the series, most notably The Data Doctor ("Back in the Red", series VIII), Human Kryten ("DNA", series IV), and Able ("Beyond A Joke", series VII -which was co-written by Llewellyn).

Robert's first foray into the world of show business started out as a hobby. He was part of a comedy group called The Joeys, with Bernie Evans, Nigel Ordishand and Graham Allum. The group toured the UK and Europe in the early 1980s. Llewellyn wrote much of the material, and also began writing novels. The group split in 1985, having toured for years and done thousands of shows.

Robert's big break came when he was seen at the Edinburgh Festival Fringe, performing in his new comedy, Mammon, Robot Born Of Woman. The story is about a robot who, as he became more human, began to behave increasingly badly. This was seen by Paul Jackson, producer of Red Dwarf, and he was invited to audition for the role of Kryten.

Llewellyn co-wrote the Red Dwarf episode "Beyond A Joke", from series VII in 1997, with Doug Naylor.

In 1997 Llewellyn provided the voice of feeble for a computer game called the feeble files.

Llewellyn has presented a number of programmes for UK television. His first outing as presenter was on Scrapheap Challenge produced by Channel 4; the series sees teams of engineers competing to build machines to complete a given task from materials scavenged from a scrapheap.

His other presenting roles include a version of Discovery Channel's How Do They Do It? and Hollywood Science, the latter of which is a joint production between the BBC and the Open University.